Jeffrey Dunn, MD, was an undergraduate French literature major who had to take a course in molecular biology—and it changed his life. In this video, Dunn, now division chief for clinical neuroimmunology at Stanford Health Care, talks about why his focus became multiple sclerosis (MS), a disease whose cause and cure seemed a distant goal when he was a student—and his belief that the long-sought answers for people with MS will come in his generation.